Diatom,SEM

Numéro d’image : 11696437
Diatom,SEM
Diatom (Navicula sp.). Coloured scanning electron micrograph (SEM) of a single diatom. Diatoms may be extremely abundant in both freshwater and marine ecosystems; it is estimated that 20% to 25% of all organic carbon fixation on the planet is carried out by diatoms. This is possible because they contain chlorophyll. Diatoms are thus a major food resource for marine and freshwater microorganisms and animal larvae,and are a major source of atmospheric oxygen. A unique feature of diatom cells is that they are enclosed within a cell wall made of silica (hydrated silicon dioxide) called a frustule. Magnification: x2300 when printed at 10 centimetres wide
Licence : Droits gérés
Crédit: Science Photo Library / Gschmeissner, Steve
Taille de l’image : 4815 px × 3629 px
Model Release : Non requis
Property Release : Non requis
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